Problem Probable
Causes
Remedy
Burner will
If green signal light is not on:
not ignite
Switch in cold wash position Switch to hot
wash position
Flow switch or temperature Replace flow
sensor failed
switch or
temperature
sensor
Black smoke
Burner nozzle worn
Replace nozzle
from burner
High elevation
Consult factory
Bad fuel
Replace with clean
fuel after cleaning
fuel tank
White/gray
Bad fuel
Replace with clean
smoke from
fuel after cleaning
burner
fuel tank
Clogged fuel nozzle
Clean nozzle
Inlet oil line air leak
Locate and repair
leak
Bad igniter
Replace igniter
Burner inlet air wrong
Adjust inlet air
(this is the last
thing to be done)
Pump makes
Insufficient water supply Check water flow
knocking
rate to the unit
sound
Must be greater.
than machine
rating
31
31
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